POWER SYSTEM HIGHER HARMONIC REAL-TIME SIMULATOR

• Main Authors: UENO KIYOTAKA, KATSUNO TORU, KAWADA SHINYA
• Format: Patent
• Language: English
• Published: 17.09.1999
• Edition: 6
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To faithfully reproduce higher harmonic phenomena in a real system by realizing higher harmonic current response without delays to higher harmonic voltage, and enabling load in the generation of higher harmonics and absorptive load to be simulated individually. SOLUTION: This simulator is equipped with a Fourier transform means 501 which samples system voltage digitally, Fourier-transforms it, and detects the phase of the voltage of fundamental voltage, a quantity-of-current-souse-load operating means 502 which operates the higher harmonic current vector synchronized with the phase of fundamental wave voltage, based on the phase of the fundamental wave voltage and the preset current source setting currents, an instantaneous value converting means 503, which converts the higher harmonic current vector outputted from this operation means 502 into instantaneous value since waveform and converts this waveform from digital in analog so as to make a higher harmonic current command as higher harmonic wave generation load, and means which injects higher harmonic current into the system by driving a current source amplifier 504, in accordance with the higher harmonic current command.